title: The effect of stratification and seasonal variability on the profile of an anaerobic swine waste treatment lagoon.
abstract: In this study, the characterization of an anaerobic swine waste treatment lagoon from a farrowing operation (approximately 2000 sows) was carried out to examine the dynamics of the system due to stratification and seasonal variability. Swine waste samples were taken at different depths with a pulley system equipped with a special sampler that allows for sampling exclusively at certain depth. Chemicals and microbial dynamics were monitored throughout a one-year-period. Results showed that nutrient (C, N, P, S) concentrations varied according to stratified lagoon layers and season. Trace minerals (Al, Ca, Fe, and Mg), on the other hand, appeared to be affected more by stratification than seasonal variability. Molecular analysis also showed that microbial community structure appeared to be affected by the stratification and seasonal variability. Based on these data, it is important to consider the effect of stratification and seasonal variability in managing these open lagoons.
authors.affiliation: Animal Waste Management Research Unit, USDA-ARS, 230 Bennett Lane, Bowling Green, KY 42104, USA. nanh.lovanh@ars.usda.gov
authors.forename: Nanh
authors.initials: N
authors.lastname: Lovanh
authors.forename: John H
authors.initials: JH
authors.lastname: Loughrin
authors.forename: Kimberly
authors.initials: K
authors.lastname: Cook
authors.forename: Michael
authors.initials: M
authors.lastname: Rothrock
authors.forename: Karamat
authors.initials: K
authors.lastname: Sistani
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D004275:DNA, Ribosomal / Q000235:genetics; D004591:Electrophoresis, Polyacrylamide Gel; D008401:Gas Chromatography-Mass Spectrometry; D007220:Industrial Waste; D016133:Polymerase Chain Reaction; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012621:Seasons; D013552:Swine; D014867:Water
chemical_list: D004275:DNA, Ribosomal; D007220:Industrial Waste; D012336:RNA, Ribosomal, 16S; D014867:Water